Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1986-05-16
1989-03-28
Faber, Alan
Registers
Systems controlled by data bearing records
Credit or identification card systems
235379, 235382, 2353825, 235492, 34082533, 902 26, G06F 1530, G06K 1906
Patent
active
048166545
ABSTRACT:
A portable data carrier system provides improved security for files which support multiple applications, from custom repertory dialing to storage of individual medical and/or banking records. Included in the system is a portable data carrier which looks and feels much like an ordinary credit card. The portable data carrier, however, includes a computer and an electrically erasable field programmable read-only memory. Power for operation of the portable data carrier is provided from an associated station via a reader/writer. The reader/writer also couples data between the data carrier and the associated station. Operation of the data carrier is through an executive operating system that is accessed from the station via a set of commonly understood command primitives. These command primitives manipulate the files in the data carrier in accordance with security requirements. Security is enhanced since the stations's application software receiving and interpreting the data from a file sees a contiguous stream of bytes relating only to the file of the application being accessed. No information is provided to a user of a particular application about other applications in the data carrier or about the data carrier's internal file structure.
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Anderl Ewald C.
Frankel Oren
Zahavi Avi
American Telephone and Telegraph Company
AT&T Information Systems Inc.
Faber Alan
Weinhardt Robert A.
Williamson Samuel R.
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